<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <link rel="stylesheet" href="test.css">
</head>
<body>
    <main class="container">
        <div>
            <input type="radio" name="1" id="">a
        </div>
        <div>2</div>
        <div>3</div>
        <div>4</div>
        <div>5</div>
        <div>6</div>
        <div>7</div>
        <div>8</div>
    </main>


    <!-- 引入jquery -->
    <script src="jquery-3.6.4.js" type="text/javascript" charset="UTF-8"></script>
    <!-- 引入js -->
    <script src="test.js"></script>
</body>
</html>